Seagate ST9900805SS Savvio 10K.3 SAS Product Manual - Page 38

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Savvio 10K.3 SAS Product Manual, Rev. H

146GB models in 6 Gbit operation

Typical power dissipation under idle conditions in 6Gb operation is 3.48 watts (11.87 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

19). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5

volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

Figure 22.

146GB (at 6 Gbit) DC current and power vs. input/output operations per second

7.4

Environmental limits

Temperature and humidity values experienced by the drive must be such that condensation does not occur on

any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F

(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

7.4.1

Temperature

a. Operating

With cooling designed to maintain the case temperatures, the drive meets all specifications over a 41°F to

131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 20°C per

hour. The enclosure for the drive should be designed such that these temperatures not exceeded. Air flow

may be needed to achieve these temperature values (see Section 11.2). Operation at case temperatures

above these values may adversely affect the drives ability to meet specifications.

The MTBF specification for the drive is based on operating in an environment that ensures that the case

temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or

41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these tempera-

tures. Continual or sustained operation at case temperatures above these values may degrade MTBF. The

maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F (50°C).

To confirm that the required cooling for the electronics and HDA is provided, place the drive in its final

mechanical configuration, perform random write/read operations. After the temperatures stabilize, measure

the case temperature of the drive.

Section	Page
1.0 Seagate Technology support services	9
2.0 Scope	10
3.0 Applicable standards and reference documentation	11
3.1 Standards	11
3.1.1 Electromagnetic compatibility	11
3.1.2 Electromagnetic compliance	12
3.1.3 European Union Restriction of Hazardous Substances (RoHS)	13
3.2 Reference documents	13
4.0 General description	14
4.1 Standard features	15
4.2 Media description	15
4.3 Performance	16
4.4 Reliability	16
4.5 Formatted capacities	16
4.6 Programmable drive capacity	16
4.7 Factory-installed options	17
5.0 Performance characteristics	18
5.1 Internal drive characteristics	18
5.2 Seek performance characteristics	18
5.2.1 Access time	18
5.2.2 Format command execution time for 512-byte sectors (minutes)	19
5.2.3 General performance characteristics	19
5.3 Start/stop time	19
5.4 Prefetch/multi-segmented cache control	20
5.5 Cache operation	20
5.5.1 Caching write data	20
5.5.2 Prefetch operation	21
6.0 Reliability specifications	22
6.1 Error rates	22
6.1.1 Recoverable Errors	22
6.1.2 Unrecoverable Errors	22
6.1.3 Seek errors	23
6.1.4 Interface errors	23
6.2 Reliability and service	23
6.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	23
6.2.2 Preventive maintenance	23
6.2.3 Hot plugging the drive	23
6.2.4 S.M.A.R.T.	24
6.2.5 Thermal monitor	25
6.2.6 Drive Self Test (DST)	26
6.2.7 Product warranty	28
7.0 Physical/electrical specifications	29
7.1 AC power requirements	29
7.2 DC power requirements	29
7.2.1 Conducted noise immunity	32
7.2.2 Power sequencing	32
7.2.3 Current profiles	33
7.3 Power dissipation	35
7.4 Environmental limits	38
7.4.1 Temperature	38
7.4.2 Relative humidity	39
7.4.3 Effective altitude (sea level)	39
7.4.4 Shock and vibration	39
7.4.5 Air cleanliness	42
7.4.6 Corrosive environment	42
7.4.7 Acoustics	42
7.4.8 Electromagnetic susceptibility	42
7.5 Mechanical specifications	43
8.0 About FIPS	44
9.0 About self-encrypting drives	46
9.1 Data encryption	46
9.2 Controlled access	46
9.2.1 Admin SP	46
9.2.2 Locking SP	46
9.2.3 Default password	47
9.3 Random number generator (RNG)	47
9.4 Drive locking	47
9.5 Data bands	47
9.6 Cryptographic erase	47
9.7 Authenticated firmware download	47
9.8 Power requirements	48
9.9 Supported commands	48
10.0 Defect and error management	49
10.1 Drive internal defects/errors	49
10.2 Drive error recovery procedures	49
10.3 SAS system errors	50
10.4 Background Media Scan	51
10.5 Media Pre-Scan	51
10.6 Deferred Auto-Reallocation	51
10.7 Idle Read After Write	52
11.0 Installation	53
11.1 Drive orientation	53
11.2 Cooling	54
11.3 Drive mounting	55
11.4 Grounding	55
12.0 Interface requirements	56
12.1 SAS features	56
12.1.1 task management functions	56
12.1.2 task management responses	56
12.2 Dual port support	57
12.3 SCSI commands supported	58
12.3.1 Inquiry data	62
12.3.2 Mode Sense data	62
12.4 Miscellaneous operating features and conditions	66
12.4.1 SAS physical interface	67
12.4.2 Physical characteristics	70
12.4.3 Connector requirements	70
12.4.4 Electrical description	70
12.4.5 Pin descriptions	70
12.4.6 SAS transmitters and receivers	71
12.4.7 Power	71
12.5 Signal characteristics	71
12.5.1 Ready LED Out	71
12.5.2 Differential signals	72
12.6 SAS-2 Specification compliance	72
12.7 Additional information	72
Numerics	73
A	73
B	73
C	73
D	73
E	74
F	74
G	74
H	74
I	74
J	74
K	74
L	74
M	75
N	75
O	75
P	75
Q	75
R	75
S	76
T	76
U	76
V	76
W	76

Seagate ST9900805SS Savvio 10K.3 SAS Product Manual - Page 38

Environmental limits

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